thanks for all the coments the 55 has a yellow tang,a tomato clown with hosting anenome, 2 pajama cardinals and a sixline wrass, and a sailfin blenny,a redlegged hermit crab,8 snails,and a decorator crab........about 30 lbs of tonga and 40 lbs of live rock...........the 90 gallon has a cow fish ,lionfish, grouper, snowflake eel, birdwrass........i had these tanks runnin for aprox 1 1/2 years when i started doing salt i read for about a year on it before i started.....the wifes Christmas present is a 40 gallon hex mating pair of seahorses where gonna take a shot on those knowing how difficult they are....